9.3 Electric charge Flashcards
flow of charged particles from one place to another
current electricity
Current that flows in one directions without reversing
Direct Current
current that flows in one direction and regularly reverses
Alternating current
What causes electron flow?
attraction and repulsion between electric charges
What measures current?
Ammeter
Unit used by most electric companies to charge users
kilowatt-hour
what is electric potential called
voltage
SI unit of voltage
volt
Person who invented the battery, the volt is named after him
Alessandro volta
what is the rate of the charges flow
current
SI unit of current
Ampere
conductors, insulators, semi conductors
know these terms
the amount an object hinders electron flow
Resistance
SI unit of resistance
Ohm
Energy used to overcome resistance, is converted to heat
Joule heat
What are the four factors affecting resistance
length, width, diameter, temperature
What is material that allows current to flow with no resistance
Superconductor
Electric device designed to add resistance to a circuit
resistor
Define ohms law
Current flowing through a conductor is directly proportional to voltage and inversely proportional to the resistance
